Disa welwitschii Rchb.F.

Species

Angiosperms > Asparagales > Orchidaceae > Disa

Characteristics

An orchid that grows in the ground. It grows 20-100 cm tall. There are 2-4 leaves on a non flowering shoot. These are narrow and 10-30 cm long. They are folded along their length. The leaves on the flowering shoot are sword shaped and 3-10 cm long. The flowering shoots are 3-14 cm long and have 20-100 flowers densely crowded along them. The flowers are bright orange to red.
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Petals 2-lobed; anterior lobe 3–7(8.5)× 2.5–6 mm, ovate, spreading, the upper margin incurved; posterior lobe equalling anterior lobe in length, or exceeding it by one third, truncate or ovate lanceolate.
Terrestrial herb, up to 500 mm tall. Spur shorter than dorsal sepal. Petals bilobed, anterior lobe ovate, posterior lobe one-third taller, oblanceolate, obliquely truncate. Flowers bright red.
Fertile shoots 20–100 cm tall; leaves imbricate to subimbricate, the basal 2 reduced to short sheaths blotched with red; the remainder 3–10 cm long, lanceolate, subacuminate, mostly sheathing.
Sterile shoots to 15 cm tall, with 2–4 suberect conduplicate leaves, 10–30 × 1–4 cm, linear-elliptic, acute or apiculate; basal sheath, often blotched or red-striped.
Spur pendent from below the middle of the galea, reaching to below the base of the sepal, slender, 3.5–9 mm long, cylindrical to rarely subclavate.
Floral bracts inconspicuous, as long as the ovaries, taller than ovaries at base of inflorescence, narrowly ovate, acuminate.
Dorsal sepal subrhomboid; galea 4.5–11 mm long, narrowly oblong to lanceolate, subacute.
Lateral sepals suboblique, 5–12 × 3–6(8) mm, oblong-ovate, obtuse to rounded.
Linear leaves up to 18 in. long on sterile shoots and sheaths on the scape
Terrestrial herb with separate sterile and fertile shoots.
Inflorescence dense, 3–14 cm long, 20–100-flowered.
Flowers bright red to carmine, or pink.
An erect terrestrial herb, 1-3 ft. high
Lip 4–12 mm long, linear.
Stigma equally 3-lobed.
Flowers pink or purple
Ovary 10–20 mm long.
Anther 3–5 mm long.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.2 - 0.91
Root system -
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Root diameter (meter) -
Flower color
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Nitrogen fixer -
Photosynthetic pathway -

Environment

It is a tropical plant. It grows in wet grassland. In Zimbabwe it grows between 900-2,400 m above sea level.
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In grasslands and swamps.
Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-12

Usage

Uses environmental use poison
Edible roots tubers
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
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Distribution

Disa welwitschii world distribution map, present in Angola, Burkina Faso, Central African Republic, Congo, Gabon, Guinea, Kenya, Liberia, Mozambique, Nigeria, Sudan, Sierra Leone, Tanzania, United Republic of, Uganda, South Africa, Zambia, and Zimbabwe

Identifiers

LSID urn:lsid:ipni.org:names:630295-1
WFO ID wfo-0000944614
COL ID 36S4Q
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Disa welwitschii Disa welwitschii var. buchneri

Lower taxons

Disa welwitschii subsp. occultans Disa welwitschii subsp. welwitschii Disa welwitschii var. welwitschii